People enjoy their time near the Arcadia stage at the Glastonbury Festival site in Somerset, Britain on June 24, 2023. (Photo by Jason Cairnduff/Reuters)

Revellers dance at a rave party in central Kyiv, Ukraine on August 27, 2022. (Photo by Vladyslav Musiienko/Reuters)

Firefighters try to extinguish a fire caught on a passenger train, ahead of the general election in Dhaka, Bangladesh, on January 5, 2024. (Photo by Mohammad Ponir Hossain/Reuters)

DJ Drama (R) arrives at America's Got Talent is seen on March 28, 2025 in Pasadena, California. (Photo by Hollywood To You/Star Max/GC Images)

Protesters practice using slings as they block a road in support of former President Evo Morales in the face of an investigation opened against him for the alleged abuse of a minor while in office, in Parotani, Bolivia, Thursday, October 31, 2024. (Photo by Juan Karita/AP Photo)

A morgue attendant at the Johannesburg branch of the South African funeral and burial services company Avbob keeps the curtain open from inside a refrigerated container where bodies of patients deceased with COVID-19 related illnesses are kept isolated ahead of their burials on January 22, 2021. (Photo by Marco Longari/AFP Photo)

Afghan children play on the remains of a Soviet-era armored personnel carrier on the outskirts of Jalalabad on February 15, 2016. Soviet troops withdrew from Afghanistan on February 15, 1989, after ten years of fighting against Mujahidin militiamen. (Photo by Noorullah Shirzada/AFP Photo)

With its huge eyes, comical name and diminutive size, Mark R. Smith’s image of a baby Hawaiian bobtail squid can’t help but raise a smile. A curiously endearing creature, the cephalopod is just 1.5cm across, its mantle cavity bearing more than a passing resemblance to a rather natty shower cap. But it is also a beautiful example of symbiosis – nature’s version of “I’ll scratch your back if you scratch mine” – for on the underside of the squid is a light organ which houses bioluminescent bacteria. The squid offers the bacteria protection and food, while the bacteria emit a glow – a handy trait that the squid uses to offset its silhouette, helping it to evade predators in the depths below. Mark R. Smith’s entry combines several images of a Hawaiian bobtail squid with different focus lengths to create a final picture with greater depth of field than normal. (Photo by Mark R. Smith/Wellcome Images/Macroscopic Solutions)